"It affects how the plants grow, how hard it is to do their work," he said.

On a short-term basis, the dry, sunny weather helps the nursery. Plants thrive and flowers bloom. But too much dry weather, kills them.

The nursery depends on the weather so much, that abnormally dry conditions, could force the 26-year-old company to shut down.

"We need water, as long as there's water and everything's on a watering system, you can get by until there's not enough water in the system where they start rationing it," said Durston.

On the other hand, rain for a long period of time can also hurt the nursery. That's what happened last year, when Oahu received 40 consecutive days of rain. It destroyed plants and put a damper on sales. And all of this has a trickle-down effect. Bad weather cuts their supply. That means fewer flowers for customers.